Hello Tim,
I certainly believe it is
based on a Lebel bayonet, but the finish is quite different, and the blade is not fluted.
More likely I think it was made to resemble the Lebel bayonet. (Image attached, courtesy of
http://www.bajonet.be )
As to whether it would/could be fitted to a cleaning rod I am unsure, but the caveats listed by Rick are certainly worth bearing in mind, and would make it fairly impractical I think.
Certainly an interesting piece none the less.
Kind regards,
Chris